High-temperature-resistant clean type self-adhesive protection film and preparation method thereof

Abstract

The invention discloses a high-temperature-resistant clean type self-adhesive protection film which comprises a self-adhesive layer, a middle layer and a back material layer, wherein the self-adhesive layer and the back material layer are positioned on two sides of the middle layer; the self-adhesive layer consists of 5-20wt% of low-density polyethylene, 55-80wt% of metallocene polypropylene low-density elastomer and 15-30wt% of SEBS; the middle layer consists of 70-85w% of high-density polyethylene and 15-30w% of low-density polyethylene; the back material layer consists of 65-85w% of middle-density polyethylene and 15-35w% of low-density polyethylene; the self-adhesive layer, the middle layer and the back material layer respectively account for 5-20 percent, 60-80 percent and 5-20 percent of the total weight of the protection film; the sum of the weight ratios of the self-adhesive layer, the middle layer and the back material layer is 100 percent. According to the high-temperature-resistant clean type self-adhesive protection film, a composite bottom film comprising the self-adhesive layer, the middle layer and the back material layer is prepared by co-extrusion film blowing; by the special design of all the layers, in particular the self-adhesive layer, the self-adhesive protection film is high in bonding strength, high-temperature-resistant and high in puncturing strength; meanwhile, in a co-extrusion film blowing process, effective combination and the processing stability are guaranteed.

Description

technical field [0001] The invention relates to the technical field of processing and preparation of polymer materials, in particular to a high-temperature-resistant clean self-adhesive protective film and a preparation method thereof. Background technique [0002] At present, during the transportation, storage, processing or assembly of many commodities, it is often necessary to protect the surface of materials and parts to prevent harmful gases, microbial corrosion and dust pollution, or to avoid scratches caused by mechanical scratches, etc., commonly used One of the methods is to paste a layer of protective film on the surface of the protected object, and after the transportation, storage, processing or assembly are completed, the protective film is removed to protect the surface of the material. Common protective film products on the market include PP (polypropylene) film, PVC (polyvinyl chloride) film, PE (polyethylene) film, EVA (ethylene-vinyl acetate copolymer) film...

AI Technical Summary

Problems solved by technology

[0005] As mentioned earlier, high temperature resistance, cleanliness and good viscosity are the application characteristics that must be possessed by surface protection film materials. Although the existing co-extrusion protection film production process is more environmentally friendly and has been widely used, there are still some shortcomings, such as , the existing three-layer co-extrusion blown film, its high temperature resistance is poor, its adhesive strength changes with the temperature, the paste is firm at high temperature, but sometimes it is too firm and difficult to tear off when it is serious, affecting the surface of the protected object , and at low temperatures, the viscosity becomes worse, and even falls off, which cannot protect the surface. These deficiencies affect the development of protective films, especially self-adhesive protective films.

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